{
  "id": "redis/cluster-node-timeout-split-brain",
  "signature": "ERR Cluster node timeout exceeded, possible split-brain detected",
  "signature_zh": "集群节点超时，可能检测到脑裂",
  "regex": "ERR Cluster node timeout exceeded, possible split-brain detected",
  "domain": "redis",
  "category": "runtime_error",
  "subcategory": null,
  "root_cause": "A cluster node failed to respond within cluster-node-timeout, leading to a potential split-brain scenario where multiple nodes assume master roles.",
  "root_cause_type": "generic",
  "root_cause_zh": "集群节点在 cluster-node-timeout 内未响应，导致可能的脑裂场景，多个节点假定为主节点角色。",
  "versions": [
    {
      "version": "6.2",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "7.0",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "7.2",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "Delays detection but does not prevent network partitions; can worsen split-brain.",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "May cause data loss if RDB/AOF not synced; does not resolve underlying network issues.",
      "fail_rate": 0.85,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Split-brain can cause inconsistent data; manual intervention required.",
      "fail_rate": 0.95,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "Run 'CLUSTER FORGET <node-id>' on all healthy masters to remove the unresponsive node, then rejoin it after network recovery.",
      "success_rate": 0.8,
      "how": "Run 'CLUSTER FORGET <node-id>' on all healthy masters to remove the unresponsive node, then rejoin it after network recovery.",
      "condition": "",
      "sources": []
    },
    {
      "action": "Configure sentinel monitors with quorum = majority of nodes to prevent split-brain. Example: 'sentinel monitor mymaster 127.0.0.1 6379 2'.",
      "success_rate": 0.88,
      "how": "Configure sentinel monitors with quorum = majority of nodes to prevent split-brain. Example: 'sentinel monitor mymaster 127.0.0.1 6379 2'.",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [
    "在所有健康主节点上运行 'CLUSTER FORGET <node-id>' 移除无响应节点，网络恢复后重新加入。",
    "配置 sentinel monitor 使用多数节点作为法定人数，防止脑裂。示例：'sentinel monitor mymaster 127.0.0.1 6379 2'。"
  ],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": "https://redis.io/docs/latest/operate/oss_and_stack/management/scaling/",
  "official_doc_section": null,
  "error_code": "ERM",
  "verification_tier": "ai_generated",
  "confidence": 0.82,
  "fix_success_rate": 0.75,
  "resolvable": "partial",
  "first_seen": "2023-08-20",
  "last_confirmed": "2024-06-01",
  "last_updated": "2024-06-01",
  "evidence_count": 1,
  "tags": [],
  "locale": "en",
  "aliases": []
}